DD266784A1 - DRIVE FOR A CURVED ARC SUPPLY SYSTEM - Google Patents

Abstract

The invention relates to the drive for a cam-controlled sheet feeding system, in particular for sheet-fed rotary printing machines. It is an object of the invention to provide a drive for a cam-controlled Bogenzufuehrsystem that minimizes the magnitude of the torque fluctuations, without even initiate vibrations in the system. According to the invention this is achieved in that at least one cam-controlled torque-compensating gear is arranged on the feed drum shaft in addition to the drive curve of the sheet feed system and the counter-drive curve. Fig. 4

Description

For this 4 pages drawings

Field of application of the invention The invention relates to the drive for a kurvrngostouortos Bogenzuführeystom, in particular for Bogonrotationsdruckmaschinon. The sheet-fed rotary printing press consists of one or more printing units, with the orstGn printing unit being an anlogue table

is associated, of which the aligned un d in the rest position arc by the gripper of the periodically working

Sheet feeding system accelerated, accelerated to Majchonongoschwlndigkolt and a rotating cylinder (Anlogtrommel)

is handed over.

The propulsion system's propulsion system is composed of non-uniform translating gearboxes and thrusts over one Gear train in connection with the printing units of the press. Characteristics of the known prior art The periodic operation of the Bogenzuführsystoms caused oinon periodically fluctuating Momontonbedarf, dor to Vibrations in Bogenzuführsystom and üoor the gear train leads into the Druckworkon. Diose oscillations condition Passorfohler or Doublieren and thus quality defect or Committee dor printed products. To eliminate this Nachtoile it is known, by unsprung Beiläufor a permanent Zahnflankonanlago zuorn and so

to improve the printer's performance. However, the use of non-denuded Beiläufor leads only to printing machines with single-size cylinders to success.

It is also gofodortor to achieve a permanent Zahnflankonanlage in periodically operating systems dio prewired Beiläufor known. However, these must werdon after the maximum engine speed werdon what to oiner high Tensioning of the gears at all speeds and thus leads to high wear. In addition, diose

sprung runners only up to low power rolativ a safe Zahnflankenanlago and require a large space.

The sprung and unsprung Beiläufor have beyond the fnmoinsamon disadvantage that sio though by a Spanning the gears in certain areas oino permanent tooth flank system allow the strain jodoch

an increased on pre-wear conditional. In addition, only the effects of momentum fluctuation on the asset register are eliminated by the contributors, but not their transfer to the postpress printing machine and the consequent effects on the quality of the dot print products are prevented.

It is also known to directly influence the torque demand or the torque fluctuations. Often you will Flywheels used, however, due to the existing Masson the pressure, rubber and Plattenzylindor so large

should be dimensioned that their application is not possible in the specific case.

Furthermore, trained as a sliding-crank gear Momontonausgloichsgetriobo are known, however, due to their inner

and outer dead spots are not gooignet for a periodically operating sheet feeding system, since the lead time of

Torque characteristic can not be varied to the required extent. In addition, harmful to printing presses Additional disturbances, since work is carried out in the subcritical range. For torque compensation and Foderkomponsatoren are known, however, the iodochoch always designed for the maximum speed

which cause high wear and initiate vibrations into the system below these speeds. Therefore, they are not suitable for sheet feeding systems.

In addition, theoretically cam-controlled momentum compensation got drives are known, their use in printing press construction

but could not be proved.

Object of the invention

It is an object of the invention oine drive for a cam-controlled sheet feeding system to create, which increases the print quality, reduces the Vorschioiß the printing press and is universally applicable.

Wosen dor Erflnciunu

It is an object of the invention schaffon a drive for a Bogenzuführsystom schaffon that minimizes the size of the Drehmomentschwankungon without solos induce vibrations in dos system.

Eriindupgsgomäß this is achieved by the fact that at the Anlegtrommolwo'lo nebon the Anlriobskurvodes Bogemuführsystoms and the Antriebsgegenkurvo at least one curvongostouettos Momentonaubglelchsgotriobe is arranged.

The motion equation for the momentum equation curve is realized by at least one jerk-free and sine-free sinusoidal line for the equal and the gantry section.

embodiment

At oinem Ausführungsbeispiel example, the invention will be explained in more detail. In don drawings shows

Fig. 1: the Anlegdruckwerk a printing machine with the feed table

Pig. 2: a schematic diagram of the Schwinganiagonantriebs

3 shows a Prinzipstollenung the Momentonausgloichgetriebes

Fig. 4: a diagram of the spatial arrangement of the transmission on the Anlogtrommoiwollo

1 shows in a Seitonansicht dos Anlogdruckwork 1 a Bogenrotationsdruckmaschino consisting of dom impression cylinder 2, dom blanket cylinder 3, the Plattenzyllndor 4, the Anlogtrommol 5, dom feed table β and dom periodiech working Bogonzuführsystem, which in the exemplary embodiment as an oscillating system 7 and on the swing shaft 7.1 is stored.

At the feed table β a Soitenausrichteeinrlchtung 8 and front lays 9 are arranged. At the feed drum 5 and the impression cylinder 2 clamping gripper 10 are provided.

On the printing cylinder wool 11 is a Schneckonra <12, which is in engagement with the worm 12.1, which is connected via the input drive 27 to the main motor 26, and the Drucluylindorzahnrad 13 rotatably disposed, which via the blanket cylinder gear 14 with dom plate cylinder gear 15 and the on the Anlogtrommolwelle 16 arranged Anlegtrommolzahnrad 17 meshes. On the Anlogtromrnolwelle 16 are still as Fig.2 shows a drive curve 18 of the oscillating system 7 stored with Antriebsgogonkurve 19. Dio Antrlebskurvo 18 consists of a synchronized section 18.1 and a Gegonlmifobschnitt 10.2. The Antriobsgegonkurve 19 is accordingly ausgeobildot. The Antriobskurvo 18 is about Rollo 20, Rollonhebol 21 with the four-bar linkage 22 and the Antriobsgogenkurvo 19 on dio role 23, Rollonhebol 24 with the Gslenkviorock 25 in operative connection. The on the drive curve 18 and thus on dor Antriobsgegenkurvo 19 roalisiorto Bowegungsverlauf is 180 ° spiegolsymmrisch.

On the Anlogtrommol 16 is still a Mjmentonausgleichsgetriobo? 8 with the Ausgloichskurvo29, dioden Gloichlaufabschnitt 29.1 and don mating section 29.2 has arranged. Through them, the Ausgloichsdrehmasse 32 is driven via the Kurvenrollo 30, the Rollenhebol 31. The Ausgleichgegegonkurve 33, which is formed according to the Ausgleichskurvo 29 and also arranged on the Anlegtrommelwello 16 is connected via a roller blind 34 and don roller planer 35 with dor Ausgloichsdrohmasse 32 in operative connection. The sequence of movements of the Ausgloichskurve 29 for don equal and mating section 29.1,29.2 is realized by at least one jerk and shock-free Sinusllnio.

It is also possible, by using oinor Nutkurvo the compensation curve 29 and Ausgloichsgegenkurvo 33 in one component summarized.

The operation of the invention is as follows:

On dom feed table 6, the sheets are fed in a staggered manner and aligned at the pre-marks 9 to the leading edge and then by the Soitonkantenausrichteeinrlchtung 8 after the Seitonkante. The sheet at rest is detected by the clamping gripper 10 of the Schwinganlago 7, after the Vordermarkon 9 were swung accelerated up to machine speed and to dio clamping gripper 10 of the feed drum 5 passed. Of the clamping grippers 10 Anlogtrommol 5 of the sheet is transferred to the clamping gripper 10 of the printing cylinder 2 and printed in the sequence. After transferring the sheet to the clamping gripper 10 of the application drum 5, the oscillating system 7 is delayed until reversal lag (Ruholage). Subsequently, a movement to the feed table 6 takes place, again by an acceleration to machine speed followed by a delay in the Ruhelago. From this course of motion results in a torque curve, which is the same in both Halbporiodon, but hoho has instantaneous value.

The drive of the Anweltrommelwello 16 carried by the main motor 26 via the input drive 2 "^, the worm 12.1, the worm wheel 12, the pressure cylinder gear 13 and the Anlegtrommelzahnrad 17. By dio on dor Anlogtrommolwelle 16 arranged curve 18 and Gegonkurve 19 via roller 20, Rollenhebol 21st Rolon 23, roller lever 24, four-bar linkage 25 dio control dor Schwinganlago 7. By also on the feed drum 16 by means of the compensation curve 29 and Ausgloichsgogenkurve 33 arranged differential gear 28 occurring in don half periods hohon Momontanwertö the Momentonverloufs be compensated, so that no vibrations have been introduced into the system.

Claims (2)

1. Drive for a curved sheet feed system, wherein the sheet feed to a drive drum and the feed drum are arranged with the drive curve on a common feed drum shaft, characterized in that on the feed drum shaft (16) at least one medium Balance cam (29) controlled torque compensation gear (28) is arranged. 2. Drive according to claim 1, characterized in that the course of movement of the compensating cam disc (29) by means of at least οίηβί jerk and shock-free sinusoidal for the synchronizing section (29.1) and mating section (29.2) is realized.